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set-expr.hpp

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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
00002 /*
00003  *  Main authors:
00004  *     Guido Tack <tack@gecode.org>
00005  *
00006  *  Copyright:
00007  *     Guido Tack, 2010
00008  *
00009  *  Last modified:
00010  *     $Date: 2011-01-21 16:01:14 +0100 (Fri, 21 Jan 2011) $ by $Author: schulte $
00011  *     $Revision: 11553 $
00012  *
00013  *  This file is part of Gecode, the generic constraint
00014  *  development environment:
00015  *     http://www.gecode.org
00016  *
00017  *  Permission is hereby granted, free of charge, to any person obtaining
00018  *  a copy of this software and associated documentation files (the
00019  *  "Software"), to deal in the Software without restriction, including
00020  *  without limitation the rights to use, copy, modify, merge, publish,
00021  *  distribute, sublicense, and/or sell copies of the Software, and to
00022  *  permit persons to whom the Software is furnished to do so, subject to
00023  *  the following conditions:
00024  *
00025  *  The above copyright notice and this permission notice shall be
00026  *  included in all copies or substantial portions of the Software.
00027  *
00028  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00029  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00030  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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00035  *
00036  */
00037 
00038 #ifdef GECODE_HAS_SET_VARS
00039 
00040 namespace Gecode {
00041 
00042   /*
00043    * Operations for expressions
00044    *
00045    */
00046   forceinline
00047   SetExpr::Node::Node(void) : use(1) {}
00048 
00049   forceinline void*
00050   SetExpr::Node::operator new(size_t size) {
00051     return heap.ralloc(size);
00052   }
00053   forceinline void
00054   SetExpr::Node::operator delete(void* p, size_t) {
00055     heap.rfree(p);
00056   }
00057 
00058   forceinline
00059   SetExpr::SetExpr(void) : n(NULL) {}
00060 
00061   forceinline
00062   SetExpr::SetExpr(const SetExpr& e) : n(e.n) {
00063     n->use++;
00064   }
00065 
00066   forceinline bool
00067   SetExpr::same(NodeType t0, NodeType t1) {
00068     return (t0==t1) || (t1==NT_VAR) || (t1==NT_CONST) || (t1==NT_LEXP);
00069   }
00070 
00071   inline SetVar
00072   SetExpr::post(Home home) const {
00073     Region r(home);
00074     SetVar s(home,IntSet::empty,
00075              IntSet(Set::Limits::min,Set::Limits::max));
00076     NNF::nnf(r,n,false)->post(home,SRT_EQ,s);
00077     return s;
00078   }
00079 
00080   inline void
00081   SetExpr::post(Home home, SetRelType srt, const SetExpr& e) const {
00082     Region r(home);
00083     return NNF::nnf(r,n,false)->post(home,srt,NNF::nnf(r,e.n,false));
00084   }
00085   inline void
00086   SetExpr::post(Home home, BoolVar b, bool t,
00087                 SetRelType srt, const SetExpr& e) const {
00088     Region r(home);
00089     return NNF::nnf(r,n,false)->post(home,b,t,srt,NNF::nnf(r,e.n,false));                  
00090   }
00091 
00092 }
00093 
00094 #endif
00095 
00096 // STATISTICS: minimodel-any